Valve-spring lifter.



4 witnesses F. J. VLCHEK.

VALVE SPRING LIFTER.

APPLICATION FILED MAR. 21, 1914.

Patented Nov. 9, 1915. v

Hank J V6611 1 RAPH 0.,WASHINGTON D c little effort on the part of the one usingthe.

FRANK mvnonnx, or: CLEVELAND, onro.

'VALVE-SPRING LIFTER.

. Specification of Letters Patent.

Patented Nov. 9,1915.

Application filed March 21, 1914. Seria1-No. 826,203.

To all whom it may concern:

Be it known that I, FRANK J. VLoHEK, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Qhio, have invented certain new and useful Improvements in Valve-Spring- Lifters, of which the following is a specification.

This invention relates to a tool for relieving the tension of the coiled sprlng around the valve stem of an internal combustion engine to permit the removal of thevalve.

The princi al object of the invention is to provide a valve spring lifter-Which is of simple practioalconstruetion and inexpen-- sive to manufacture, and is very eflicient for accomplishing the above stated purpose, the

tool being so designed that a powerful cam action is obtained for releasingthe tension of the coiled spring with comparatively tool.

With the above and other objects in view as will be readily understood, the invention will be hereinafter fully described in connection with the accompanying drawings, which illustrate a preferred embodiment thereof, and the novel features of the invention will then be distinctly pointed out in the appended claim.

In the drawings like characters of reference indicate corresponding parts.

Figure 1 is a side view ofa valve spring lifter constructed in accordance with my invention, showing the same in position for relieving the tension of the valve spring, Fig. 2 is a plan view of the tool, Fig. 3 is an enlarged fragmental portion, partially in section, illustrating the cam action feature of the tool, and Fig. 4 is a sectional view on line 44 of Fig. 3.

Referring to the drawings, 1 represents a portion of an internal combustion engine, 2 the exhaust valve supported by a stem 3, and 4: a coiled spring surrounding the valve stem. A cotter pin 5 fixed in the valve stem at a suitable position is adapted to support a cupped washer 6 for carrying said coiled spring to cause the same to exert the necessary tension on the valve. The lower end of said valve stem is slidably mounted in a stationary support 7, and is adapted to be engaged by the usual rotatable cam for actuating the valve.

The tool herein set forth and described is 3 designed to compress the coiled spring 4= for relieving the tension on the valve, so that the cotter pin '5 may be easily withdrawn and the cupped washer 6 removed topermit the ready removal ofthe valve, or-after replacing the valve, the washer may be restored to its proper position and the cotter pin conveniently inserted. a e

The valve spring releasing tool consists of a pair of complemental levers 8 and9, having corresponding outwardly curved ends 10, which are pivotally connected at 11 between pairs of lugs 12 of a transverse head 13. Said levers are slightly tapering in width from their attached ends to their free ends, which terminate in flattened and forked members 14, for straddling the valve stem 3. The forked members 14 have sharp noses, indicated at 15, to permit easy and quick insertion of the tool in its application for releasing the tension on the coiled spring. i

.The levers 8 and 9 are forced apart by operating a handle 16 formed integral with a threaded rod 17 which is rotatably mounted in the transverse head 13. 7 The inner end of said threaded rod is reduced in diameter as shown at 18, thereby leaving an annular shoulder 19. Swiveled to said reduced portion is a longitudinally reciprocating cross cam 20, which is provided with a boss 21 for receiving the thrust of the shoulder 19. The projecting end of said threaded rod is further reduced and threaded at 22 for receiving a stop nut 23 to retain the cam on the rod. Said cam is slidably connected to the which correspond to and are adapted toengage the inner edges 27 of said curved end portions. The outer walls 28 of the cam slots 25 are adapted to engage the outer edges 29 of the curved end portions of the levers for forcing the levers to their closed position. Said outer walls 28 of the cam slots are chamfered or rounding as shown to allow free sliding movement of the cam upon the levers.

In order to permit ready assembling of the levers 8 and 9 within the cam slots 25, portions of the cam above the slots are removed, as shown at 30, but overlapping edges 31 are left to retain said levers within said slots. The width of the openings between the ends 32 of the edges 31 and the outer walls 28 of the cam slots is of a size sufficient for admitting the narrower tapering portions of the levers. are thus placed within the slots and the cam is slidably moved to its proper position, the

' outwardly curved end portions 10 being of greater width than the width of the openings to the cam slots, they are retained therein by the overlapping edges 5310f the cam.

' It will be obvious that the herein de scribed valve spring releasing tool is convenient to adjust between the end coil of the coiled spring 4: and the stationary support 7; and that by comparatively little manual exertion in operating the handle 16,

great power will be transmitted by the cam 20 to the outwardly curved end portions 10, a

When the levers Although the embodiment of the invention as illustrated and described will accomplish the intended purpose, it is to be understood that slight changes in the details of construction may be made within the scope of the claim.

Having fully described my invention, what I claim is 2' In a valve spring lifter, the combination of a pair 01": levers, a head, the levers being pivotally connected to the head, the levers being tapering in width, a cam, the cam having slots for receiving the wide portions of the levers, the cam being provided. with openings in one side thereof less in width than the wide portions of the levers and leading to the slots for admitting the nar rower portions of the levers but leaving overlapping edges for retaining the wide portions of the levers in the slots, and means for operating the cam to actuate the levers, r

substantially as described.

In testimony whereof I aifix my signature in presence of two witnesses.

FRANK J. VLGHEK.

Witnesses:

GEORGE F. Gnssnnn, C. J. EDWARDS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, .D. C. 

